BISTATIC FREQUENCY-SWEPT MICROWAVE IMAGING - PRINCIPLE, METHODOLOGY AND EXPERIMENTAL RESULTS

The basic principle, methodology and experimental results of frequency -swept microwave imaging of continuous shape conducting and discrete l ine objects in a bistatic scattering arrangement are presented. Theore tical analysis is developed under the assumptions of plane wave illumi nation and physical optics approximation. The measurement system and c alibration procedures are implemented based on the plane wave spectrum analysis. Images of three different types of scattering objects recon structed from the experimental data measured in the frequency range 7. 5-12.5 GHz are shown in good agreement with the scattering object geom etries. The results demonstrate that the developed bistatic frequency- swept microwave imaging system has potential as a cost-effective tool for the application of remote sensing, imaging radar, and nondestructi ve evaluation.